Blue-printing apparatus



(No Model.) 2 Sheets-Sheet 1.

P'. HEINZE. BLUE PRINTING APPARATUS.

No. 469,244. Patented Feb. 23, 1892.

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P. HEINZE. BLUE PRINTING APPARATUS. Pla-469,244. Patented Peb. 23, 1892.f H c: 7J l L 'l- -f;\"\ (`v`f WLM/www 14mm/lion vsection of the same.

UNITED STATES PATENT OFFICE.

PAUL IIEINZE, 'OF CHICAGO,l ILLINOIS.

BLUE-PRINTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 469,244, dated February23, 1892.

Application filed December 10, 1890. Serial No. 374,251. (No model.)

To a/ZZ whom it may concern:

Be it known that I, PAUL HEINZE, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inBlue-Printing Apparatus, of which the following is a specification,reference being had therein to the accompanying drawings.

This my invention relates to an improvement 1n apparatus for producingby photography copies from tracings of drawings generally called blueprints57 and it is the object of this my invention to provide anapparatus by which drawings of any length can be copied by theblue-printing process; and with that object in View my inventionconsists of the novel devices and combinations of devices hereinafterdescribed and specifically claimed.

In the accompanying drawings, Figure 1 represents a longitudinalvertical section through the center of my machine; Fig. 2, a plan view,and Fig. 3 a transverse vertical Figs. et, 5, and 6 are details of theelastic stretchers and smoothers; Fig. 7, an edge view of the paper andfast-- ener. Fig. 8 is an elevation of the bearingplate for thetension-rollers; and Fig. 9, an edge view of the same, with ends of therollers in connection therewith. Fig. 10 is an end'view of the paper andcanvas carrying rollers, and Fig. 11 a side elevation showing theconnecting-gears for co-operative movement of such rollers.

Corresponding letters and numerals of reference in the several figuresof the drawings designate like parts.

A denotes a transverse table supported on flanged wheels 1, riding uponrails, and upon this table is placed the box B, adapted to turn thereon,the same being held on a central position' by a pivot-pin 2, securedunder the center of such box B and engaging a socket 3, secured upontable A and being supported on four or more wheels 4, pivoted insuitable brackets secured under the edges of such box B and riding'upona 'circular track on table A.

The box B has a parallopipedon shape, with one corner segmentally open.The bottom ends and sides of this box are rigidly connected, and alongitudinal strip 5 is also rigidly secured over about the middle ofthe box, to which by hinges G is pivotally secured a lid 7,thatclosesthesquare portion of the top of the box. Between suitablebearings in the ends of the box is pivoted the shaft 3, having mountedthereon three (more or less) skeleton Wheels 9, carrying the cylindricalshell 10, made of sheet metal, the whole combined forming the drum orspool C. This drum or spool C upon one end has mounted the toothedringll, meshing with a pinion 12 in one of the lower ycorners of box B,which pinion 12, bya train of gear-Wheels, is connected with a crankwheel or pulley 13, by which slowly to rotate such drum or spool C; butin place of spurgearing, as herein shown, worm-gearing may besubstituted. In its peripherical face the shell 10 has formed alongitudinal recess 14. Perforated and overlapping this recess isprovided an extension-plate of such shell having aradially-pointingcomb-shaped edge 15, en'- gaging the perforations in recess 14, forpunching and holding the edges ofthe flexible sheets to be wound upondrum or spool C, this punching and locking operation being brought aboutby an eccentric roller 16, pivoted between ears 17, secured to the underside of the extension and pressing und er the recessed portion 14of theshell, the same to be operated from one end of the drum or spool C.

Between the ends of box B, in the upper corner thereof, are pivotedthree spools D, E, and F, the spools D and E to be removable by having asquare gudgeon 19 at one end and engaging a square socket in thecoupling-head 20 of short shafts 21 and 22, extended throughgland-shaped bearings 18 in the end of the box B, upon each of whichshafts is mounted a pinion 23 and 24., While in their opposite ends saidspools have conical sockets to engage the pointed ends of screws 25tapped through plates 26, and each having mounted upon its end ahand-wheel 27. The roller F has a gudgeon 2S, pivoted in bearing 29, anda gudgeon projected through gland-shaped bearing 31, and being squaredon its exteriorly-projecting end for a pinion 32 that can be laterallyshifted. j The pinions 23, 24, and 32 mesh with a spur-wheel 33,1ooselymounted IOO upon a stud 34, and having a hand-crank 35, by which torotate the same and thereby to turn the spools D, E, and F.

The spools D and E are split through their middle from one end to neartheir other end, where bya hinge 3G the two sections are pivotallyconnected for inserting the end of the tracing in one and the end ot'the chemicallyprepared paper in the other between such sections andholding the same byplacing a rubber ring 37 over the opening end of eachroller. The tracing, as well as the prepared paper, after being thussecured, is wound upon these rollers previous to inserting the same intothe machine. Against rollerF is permanently secured the edge of a sheetof fabric also wound upon such roller.

Forward of spools D, E, and F are placed three cylindrical rollers G,II, and I, the rollers G and H with their journals being pivoted inbearing-plates 38, secured against the inward faces of box B, and forthe journals of roller G, being provided in each plate 3S, twobearing-sockets on the same horizontal line and connected by a slot 39,so as to shift this roller G from one bearing to the other. The thirdroller I by its gravity is to produce tension to t-he tracing andchemically-prepared paper-sheets which first are passed over roller G,then under roller I, and finally again over roller Il, and thereforethis roller I is held in suspension by such sheets, but is preventedfrom dropping entirely by semicircnlar guards 40, forming parts ofplates 38. The double-bearing sockets for roller G, connected by slot39, are for the purpose of shifting sneh roller G, for allowing theroller I to drop between, and then to place the roller G in its forwardbearings, as shown by Fig. S. The forward ends of the tracing and thechemically-prepared paper after passing over roller G, under roller I,and over roller H, as well as the end of the fabric wound upon spool F,are all secured in the recess 14 of drum or spool C, to be wound thereonsimultaneously with the rotation of such drum or spool C.

The segmental opening of the box B, through which thechemically-prepared paper is to be exposed to the rays of the sun isspanned longitudinally by a series of T-bars 41, each having securedover its T-head a rubber loop 42, made by splitting a rubber tube orhose, the edges of these rubber loops being secured between the headflanges of the T- bars and metal bars by rivets. These loops 42,pressing upon the tracing-paper and canvas while being drawn from under,will serve for stretching and smoothing the sheets to be in closecontact. The web of each bar 41, near its end, is vertically slitted,thus forming a tongue 43, that engages a slot in an angular bracket 44,which brackets are secured in proper position against the end walls ofbox B, each two placed opposite forming the guides for one of the bars41, and to each end of such a bar 41 are secured two leaf-springs 45,pressing with their ends under the brackets 44 for pushing the bars 41toward the drum or spool C, and for yieldingly to accommodate themselvesto the increasing diameter of the drum or spool C as the paper andfabric are wound thereupon.

The modus operand/i is as follows, to wit: The whole machine, beingmoved upon rails into a dark room, thelid 7 is opened and the rollers Dand E are removed, when, with rotating wheel 33, by crank 35, the sheetof fabric is wound upon spool F. Now after the end edge of the sheet oftracing-cloth upon which the drawing to be copied has been drawn withIndian ink, has been secured in spool D, it is wound thereupon, andafter the end edge of the chemically-prepared or sized sheet of paperthat is to be of equal dimensions ith the tracing has been secured inspool E and has been wound thereupon, the outer ends of both thesesheets are passed over the rollers G and II, the roller G havingpreviously been placed in its rearward-bearing sockets, and then theends of the sheets wound upon spools D and E, and the end of the fabricwound upon spool F, are all secured in the recess 14 of drum or spool C.Next thc roller I, that had been previously removed, is placed upon thetracing and sized paper between rollers G and II, and then the roller Gis shifted again to its forward position, and now the lid 7 is closedand the machine is moved into the light room and in position for therays of light to enter the segmental openings between bars 41 of the boxB and through the tracing to strike the sized surface of thechemically-prepared sheet, that now becomes the printingsurface for thephotographic image of the drawing. Now with slowly rotating the drinn orspool C by turning wheel or pulley 13, either by hand or by any suitablemotor, new surfaces of the sheets are continuouslyT exposed, while thesurfaces completed disappear in the box B, where with each turn they arecovered by the fabric unwound from spool F until the entire length ofthe sheet-s has been thus exposed uniformly. After thus completed themachine is moved back again into the dark room, and there, by rotatingwheel 33, the several sheets and the fabric are separated by being woundagain upon their respective spools D, E, and F, and then after releasingtheir ends from the recess 14 of drum or spool C again the spools D andEare removed and the photographicallyfprinted paper is unrolled andsubmerged in a dcveloper for permanently fixing its surfaces andbringing out the lines produced by the shades from the lines of thetracin W'hat I claim is#- 1. In a machine for the purpose described, thecombination, with removable spools, one holding the tracing and theother the sensitive paper, of a spool or drum C, provided with a clampor holder 14 and with gearing for rotating such drum, and longitudinalbars 41, each carrying a rubber loop 42 and with open spaces betweensuch bars, the whole be- TOO IIO

ing'arranged Within a box, substantially as set forth, to operate asspecified.

2. In a machine for the purpose described, the combination, with drum orspool C, provided with clamp or holder 14 and With suitable gearing forrotating such drum, of spools D and E for holding the tracing andsensitive paper, and tension-rollers G andH and I, all arranged Within aboX, substantially as set forthto operate as specified.

3. In a machine for the purpose described, the combination, with drum orspool C, provided with clamp or holder 14 and with gearing for rotatingsuch drum, of spools D and PAUL HEINZE.

Vitnesses:

WILLIAM II. LoTZ, OTTO LUEBKERT.

